Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
15131 Alanalda (2000 ET54)
Classification: Main-belt Asteroid          SPK-ID: 2015131
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1159365496425504 3.1494e-08  
a 2.617266752897214 1.1093e-08 au
q 2.313829876072149 8.1686e-08 au
i 6.625751338557051 3.9472e-06 deg
node 61.29977110235169 3.286e-05 deg
peri 225.1294494315026 3.7985e-05 deg
M 200.7870644054871 2.0223e-05 deg
tp 2459684.484497683765
(2022-Apr-14.98449768)
8.7871e-05 TDB
period 1546.572948025221
4.23
9.8329e-06
2.692e-08
d
yr
n .2327727253083501 1.4799e-09 deg/d
Q 2.920703629722278 1.238e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2231  
   data-arc span      14891 days (40.77 yr)  
   first obs. used      1979-04-26  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46309  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:11:40  

Additional Information
 Earth MOID = 1.30313 au 
 Jupiter MOID = 2.21449 au 
 T_jup = 3.388 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO502285  

15131 Alanalda           Discovered 2000 Mar. 10 by Spacewatch at Kitt Peak.
Alan Alda (b. 1936) is an American actor, director, screenwriter and author. Best known as Benjamin Franklin "Hawkeye" Pierce in the TV series M \ast A \ast S \ast H, Alda has won numerous awards for his work including 6 Emmys and 6 Golden Globes. Alda hosted the acclaimed PBS series Scientific American Frontiers from 1993 to 2005.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

[ show close-approach data ]
Alternate Designations
 2000 ET54 = 1979 HW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-29 05:44 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin